Adding Discarded property support for onUpdate function.

chrome/test/data/extensions/api_test/tabs/basics/discarded.js

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+var testTab;
+chrome.test.runTests([
+
+    function setupWindow() {
+      var testTabId;
+
+      createWindow(["about:blank", "chrome://newtab/"], {},
+        pass(function (winId, tabIds) {

[Devlin, 2016/07/29 21:23:40]

indent parameters more, function body less:
createWindow([...], {},
             pass(function(winId, tabIds) {
  testTabId = tabIds[1];
}));

[Anderson Silva, 2016/07/29 22:12:24]

Done.

+          testTabId = tabIds[1];
+      }));
+
+      waitForAllTabs(pass(function () {

[Devlin, 2016/07/29 21:23:40]

no space between function and (

[Anderson Silva, 2016/07/29 22:12:24]

Done.

+        queryForTab(testTabId, {}, pass(function (tab) {
+          testTab = tab;
+        }));
+      }));
+    },
+
+    function discard() {
+      // Initially tab isn't discarded.
+      assertFalse(testTab.discarded);
+
+      var onUpdatedCompleted = chrome.test.listenForever(
+        chrome.tabs.onUpdated,
+        function (tabId, changeInfo, tab) {

[Devlin, 2016/07/29 21:23:40]

indent these two more, outdent the function body two.  So it should be:
var onUpdatedCompleted = chrome.test.listenForever(
    chrome.tabs.onUpdated,
    function(tabId, changeInfo, tab) {
  if (...)
  ...
});

(Note also the removal of the ' ' between 'function' and '('

[Anderson Silva, 2016/07/29 22:12:24]

Done.

+          if ('discarded' in changeInfo) {
+            // Make sure it's the right tab.
+            assertEq(testTab.index, tab.index);
+            assertEq(testTab.windowId, tab.windowId);
+
+            // Make sure the discarded state changed correctly.
+            assertTrue(changeInfo.discarded);
+            assertTrue(tab.discarded);
+
+            onUpdatedCompleted();
+          }
+        }
+      );

[Devlin, 2016/07/29 21:23:40]

nit: put the paren and the closing function brace on the same line, so this
would look like:
  if (...) {
     ...
  }
});

[Anderson Silva, 2016/07/29 22:12:24]

Done.

+
+      // TODO(georgesak): Remove tab update when http://crbug.com/632839 is
+      // resolved.
+      // Discard and update testTab (the id changes after a tab is discarded).
+      chrome.tabs.discard(testTab.id, pass(function (tab) {
+        assertTrue(tab.discarded);
+        testTab = tab;
+      }));
+    },
+
+  function reload() {
+    // Tab is already discarded.
+    assertTrue(testTab.discarded);
+
+    var onUpdatedCompleted = chrome.test.listenForever(
+      chrome.tabs.onUpdated,

[Devlin, 2016/07/29 21:23:40]

see indentation advice for line 27

[Anderson Silva, 2016/07/29 22:12:24]

Done.

+      function (tabId, changeInfo, tab) {
+        if ('discarded' in changeInfo) {
+          // Make sure it's the right tab.
+          assertEq(testTab.index, tab.index);
+          assertEq(testTab.windowId, tab.windowId);
+
+          // Make sure the discarded state changed correctly.
+          assertFalse(changeInfo.discarded);
+          assertFalse(tab.discarded);
+
+          onUpdatedCompleted();
+        }
+      }
+    );
+
+    chrome.tabs.reload(testTab.id);
+  }
+]);